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<br />EXHIBIT D -MINING PLAN (continuedy <br />This volume can be easily contained within the excavated and bermed area, therefore, no NPDES <br />or SWMP plans are needed. This can be verified directly with the Colorado Department of Health. <br />The mine plan shown on Map Exhibit C-2 shows two sediment sumps: one on either side of the <br />unnamed channel. The mine grading plan was developed to concentrate disturbed water on the site <br />into these two specific areas or basins within the permit area. The fact that the unnamed channel <br />.vill be slightly elevated from the disturbed areas will prevent any sediment-laden water from the <br />mining operation from entering the channel. <br />Each of the two sumps will be approximately 14000 square feet in area and 3.0 feet deep; each <br />holding a voltrme of approximately 0.95 acre-feet. Excavation of the gravel will be made so that all <br />runoff from the disturbed area drains to these sumps. <br />The final level of the mined site will be from l ~ to 30 feet below the existing elevation. <br />• Spi!! Prevention Contro! <br />B&B will also develop and implement a SPCC (Spill Prevention Control and Countermeasure Plan) <br />to deal with spills and prevent ground water contamination. The plan will identify all above ground <br />storage tanks (AST's) located at the site. All AST's will be protected by primary and secondary <br />contairtment systems. The plan will also deal with spill cleanup, security, EPA reporting, documen- <br />tation, spill prevention, and operating provisions. The application for the SPCC will be made <br />during the DMG review process. The implementation of the SPCC demonstrates B&B's commit- <br />ment to the stringent requirements set forth by the Clean Water Act and EPA. <br />Culver[ Crossing of Unnamed Drainage <br />A crossing of the unnamed drainage is needed for efficiency of the pit operations. The location <br />shown on Map Exhibit C-2 was chosen since it would involve no disttubance to any trees and the <br />width of the jurisdictional wetland is very nartow. The flowing wet area width at this location <br />Carol Ann Permit CDMG Application 1 9 <br />